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Neil deGrasse Tyson on Surviving in Space without a Spacesuit
Lesson duration 03:05
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¿Qué le da el valor a un billete de dólar? - Doug Levinson
Lesson duration 03:52
650,431 Views
¿Qué nos enseñaron los perros sobre la diabetes a los seres humanos? - Duncan Fe
Lesson duration 03:48
35,814 Views
3,045,114 Views
The incredible collaboration behind the International Space Station
Lesson duration 04:58
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